Pressure-regulating apparatus.



T. G. MOUAT. PRES SURE REGULATING APPARATUS.

AP PLIOATION FILED HAYS, 1909.

Patented Aug. 16, 1910.

1 mMwuF] ltllll THOMAS MO'UAT, 0I" BRATENAHL, OHIO.

PRESSURE-REGULATING APPARATUS.

eer e-la,

Specification of Letters Patent Patented Aug, 16 1910.

Application filed. may 6, 1909. Serial No. 494,334. v v

To all whom 'it may concern:

Bcit known that I, THOMAS G. Moon, a citizen of the United States, residing at Bratenahl, in the county of Cuyahoga and State of Ohio, have invented acert'ain new and useful Improvement in Prcssure-Regwlatin Apparatus, of which the following is a to I, clear, and exact description, re e ence being had to the accompanying drawmgs This invention relates to regulating apparatus, and more particularly to apparatus Jtor maintaining substantially constant the pressure and temperature of fluids being especially well adapted for use in connection with low-pressure steam-heating systerns.

It has for an object to provide an appa ratus of this character which, while being extremely simple of construction and economical of production, is very sensitive and reliable in operation. v

'lhe invention may be defined further as consistingof the combinations of elements embodied in the claims hereto annexed and illustrated in the drawings forming part,

hereof, wherein- Figure 1 represents a side elevation of a steam-boiler furnace having my apparatus applied thereto; Fi 2 represents an enlarged sectional detail of the regulating apparatus; Fig. 3 represents an enlarged sectional view-of the sleeve and cotiperatmg valve by which the influx of air to the tank may be prevented, the valve being shown in closed position; and Fig. 4; a sectional view of the line &4 of Fig. 3..

Describing the parts by reference characters, 1 denotes a steam boiler furnace; the

same being provided with an ash pit door 2 having an air supply damper 3 hinged thereto l. denotes a flue leading from the combustion chamber; of said furnace and provided with a check draft damper 5. The boiler may be provided with a steam dome 6 from which any suitable number of pipes 7 may be led to radiators (not shown) to supply steam thereto. v

The boiler proper is shown at 8 and may be of the type having water legs extending down on each side of the tire box. This boiler is shown as having, a maintained water level thereimindicated by the broken line 99. 'J

With the boiler ll employ my regulating apparatus. This apparatus comprises generally a receptacle l0 having a float 11 therein, a lever operatively connected with said float, and connections between the opposite arms of said lever and the air supply and check draft dampers. The receptacle 10 extends above and below the water level 'of the boiler and commui'iicates with the boiler. In the drawing it is shown as communicating directly with the boiler, being connected with the boiler at a point considerably below thewater, level therein, by means or pipe sections 12 and 13 connected by a tee let, the lower end of said tee forming a connection for standard 15 by means of which the receptacle is supported. Re ceptacle 10 is rovided with a cover 16 having a threaded central aperture for the re ception of an externally threaded sleeve 17. The sleeve 17 is of considerable length and is provided near. the top and bottom thereof with a pair 'of spiders, 18 18 constituting guides for the rod 19 of the float. These spiders center the float rod and at the same time normally permit the free passage of air into and out of the receptacle 10. On the lower end of sleeve 17 there is threaded a nut 20 having an inwardly projecting flange. 21. serving to clamp the s ider 18 between itself and the loweren of the sleeve 17 The lower'cnd ofthis nutis provided with a valve seat 22 for a valve 23 which is mounted on the rod 19.-.

In the upper end of the sleeve 17 there is fitted a short sleeve 24*, which is threaded into the upper end of the former sleeve and is provided with a bore constituting arr-ea:- tension of the bore of the former sleeve. The upper spider 18 is carried by .the sleeve 2d. The-upper end of the rod lllis threaded, as shown at 25, andon this threaded portion of the rod there is mounted a valve 26 adapted to coliperate with theseat on the upper end. of the sleeve 2d. This valve is carried at the bottom of an upwardly projecting sleeve 27 having itsfuppcr end provided with a contracted threaded bore adapted to receive tho'threads 25. By this constructioin tl1e ,point of connection of valve 26 with ,thevalve'rod is carried so high. as to permitthe limiting of-the threads on the rod ll to the extreme upper portion thereof, wherebyjsaid threads will not in? tertere with the reciprocation of the rod 19 .throughthe' spider 18. The threaded v connection prevents leakage of air into the receptacle. The upper end of rod 19 is pivotally connected to one arm 28 of a lever, said arm being connected by means ofa chain 30 to the air damper 3 and the opposite arm 29 being connected by ineansof a chain 31 to the check draft damper 5. The .arm 28 is provided with a weight 32 thereon adapted to partly counterbalance the door may be provided with a gage 33.

With the apparatus constructed as described, the operation will be as follows. When the pressure of steam in the boiler (or in the system connected thereto) exceeds that which it is desired to carry, this pres sure forces water into the receptacle 10, elevating the float ll-and simultaneously closing the damper 3 and opening the check draft damper 5. Should this operation fail to check the fire in time to prevent the undue accumulation of steam pressure, the water rising further in 10 will cause the valve 23 to seat against 22 and thus prevent theescape of water from saidrecept-acle. Any further transfer ,of water into the receptacle 10 will be resisted by the air confinedin the uper portion of the receptacle. On the other hand, should the pressure in the boiler become unduly lowered, the valve 6 will seat on top ofthe sleeve 24 and cut off the accessof air to the chamber .10. This is of great importance in connection with heating systems operating in connection with a partial vacuum, as the seating of the valve 26 will prevent the breaking of such vacuum.

A further point of advantage of my apparatus resides in the adjustability of the apparatus to different bollers and to tion of the lower sleeve 17. This enables me to vary the pressure (positive or negative) at which the valves 23 and 26 will engage their seats. The apparatus is very sensitive, and ,the adju'stability of the sleeve permits the closing of the dam er 3 and the opening of the check draft 5 W en the pressure of the steam is equal to the atmosphere or at any desired point thereabove, determined by the osiend of the sleeve 1 it also permits the reversevoperation of the damper at a lower pressure. It also enables me more readily-to accommodate my different levels of water in the same boiler,

Having thus described my invention, what claim is: o l p 1. In an apparatus ofthe character set forth, the combination of a boiler and means for maintaining substantially constant the pressure of steam generated by said boiler, said means comprising a receptacle communicating with said boiler, a float in said receptacle, a sleeve adjustably mounted in said receptacle and provided with a valve seat, a-rod connected withsaid float and extend ing through said sleeve, a valve carried by If. deslred, the receptacle 10 for maintaining substantially constant the pressure of steam generated thereby, said means comprising a receptacle, said receptacle communicating with the boiler and having a sleeve threaded into the top thereof, said sleeve having spiders therein forming guides and having at the upper and the lower end thereof a valve seat, a float in said receptacle, a rod carried by said float and extending through said guides, valves mounted onsaid rod and adapted to engage said seats, and a pressure regulating device connected to said rod.

3. The combination of a boiler and means for maintaining substantiall constant the pressure of steam generated thereby, said means comprising a receptacle, said receptacle' communicating with the water space of the boiler and having a sleeve adjustably mounted in the top thereof, said sleeve having one or more spiders therein forming guldes, a float in said receptacle, a rod carried by said float and provided with a valve seat and extending through said ides, a valve carried by said float and a apted to engage said seat and a pressure-regulating device connected to said rod.

4 The combination of a boiler and means for maintaining substantially constant the pressure of steam generated thereby, said means comprising a receptacle communicating with the boiler, a float therein, a sleeve ad ustably provided with guides and having valve seats at its upper and lower ends, a oat rod extending through said sleeve and having a valve adapted to cotiperate with the lower valve seat and having on its upper portion a valve, the latter valve having an upwardly pro ectin portion provided with an internal thread engaging a corresponding thread on the float rod and a pressure regulatin device operatively connected with said ro 5. The combination of a boiler and means for maintaining substantiall constant the pressure of steam generated thereby, said means comprising a receptacle commumcating with the boiler, a float therein, a sleeve connected to said receptacle and rovided connected to said receptacle and v at. its upper end with a valve, a oat rod extending through said sleeve and havin on its upper portlon a valve, the latter valve having an upwardly projectin portion provided with an internal threa engagin a corresponding thread on the float rod, an a pressure regulating device operatlvely connected with said rod.

6. The combination of a boiler and means for maintaining substantially constant the pressure of steam generated thereby, said means comprising a receptacle connnnriicah ing with suiol boiler and extending above the level of the Water therein, a sleeve adjuslubly fitted in the top of said receptacle sigrmtnre 1n the presence of two Witnesses. and having an upper and a lower valve seat, THOMAS G. MOUAT. a pressure regulating device, a connection I Witnesses:

engage said seat-s When the steam pressure exceeds and falls below predetermined llmits. 10 In teslannony whereof, I hereunto aflix my between said floatand said device, and J. B, HULL, valves operated by sald float and adapted to BRENNAN BEDEST. 

